Cognomen Grettchen (Grettchen 
) , worldwide, is a very rare family name. The last name Grettchen is characteristic of Latin America and the Caribbean, particularly Nicaragua, where it is a very rare surname, Peru, where it is an extremely rare surname, and Mexico. More prevalently, Grettchen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Grettchen | Nicaragua, Philippines, United States, Mexico, South Africa |